OFFSET
0,4
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..432
EXAMPLE
E.g.f. = 1 + x^2/2! + 6*x^3/3! + 25*x^4/4! + 140*x^5/5! + ...
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Sec[Sin[x]Exp[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jan 14 2012 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(1/cos(sin(x)*exp(x)))) \\ G. C. Greubel, Oct 26 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!( 1/Cos(Sin(x)*Exp(x)) )); [Factorial(n-1)*b[n]: n in [1..m-1]]; // G. C. Greubel, Oct 26 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved